.net User Registration With SQL Service Database?

Jun 2, 2011

I want to create a log in and registration form in VB connecting to a sql database.

Databse Name: Users
Table Name: UserDetails
Table Fields: ID, Username, Password

The ID field was specifed as primary and self incrementing by 1 and the table has one username and password (being Id: 1, Username: peter, Password: admin). The Login form works, it checks to see if the user exists, if they do, they gain access, if not a message box is displayed. The Registration form however does not and I have no idea why, its probably something simple but yeah, hence the reason Im here! When I register I can add a user fine, and it wont allow me to add the same user, but when I look at the table, it is not updated :S and I have no idea why!! Even after registering the user closing the application and starting again, say I registered the following:

Username: Fred
Password: 123

Then I login with these credentials, it works. When I close the program and reopen the program, it still works and will not allow me to register a new user being Fred, 123. However after 3 or 4 minutes when I try again, the user no longer exisits and I can re-register with set credentials? The code is shown below (1st the login form that works, second the registration that doesnt).

Public Class Login
Private Sub btnOK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOK.Click
Dim connection As New SqlClient.SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|Users.mdf;Integrated Security=True;User Instance=True")

[code]....

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